| A Simple Thinking About Blood Type | |
| Ja Kanji: | Korean: 혈액형에 관한 간단한 고찰 Japanese: 血液型くん! |
| Ja Romaji: | Hyeoraekyeonge gwanhan gandanhan gochal (Korean) Ketsuekigata-kun! (Japanese) |
| Genre: | Comedy |
| Author: | Real Crazy Man |
| Publisher: | Earth Star Entertainment |
| First: | January 26, 2013 |
| Volumes: | 5 |
| Type: | tv series |
| Director: | Yoshihisa Ōyama |
| Music: | Daisuke Hiraki |
| Studio: | Feel (Seasons 1–4) Assez Finaud Fabric (Seasons 1–4) Zexcs (Seasons 3–4) |
| Network: | Tokyo MX (Seasons 1–4) AT-X (Seasons 1–4) Nico Nico Douga (Seasons 1–3) |
| First: | April 7, 2013 |
| Last: | March 29, 2016 |
| Episodes: | 49 |
A Simple Thinking About Blood Type is a South Korean 4-panel webtoon by art teacher Park Dong-sun (박동선) under the art name "Real Crazy Man". The webtoon is themed around blood type personality classification and is serialized on Dong-sun's blog. The webtoon has been published in book form and has been adapted into an anime series.
A Simple Thinking About Blood Type was first serialized on Dong-sun's blog as a webtoon. Japanese publisher Times Culture later published the comic in book form as in 2013.[1]
A short anime adaptation was made by Japanese production houses Assez Finaund Fabric and Feel in 2013, with a second season in January 2015. Zexcs will co-produce a third season, scheduled to air in October 2015. A 4th season has been announced.[2]
Each of the voice actors also represents their own blood type.